- Vinyl
A vinyl compound is any
organic compound that contains a vinyl group (also called ethenyl), −CH=CH2. These are derivatives ofethene , CH2=CH2, with onehydrogen atom substituted with some other group.A related phrase is vinylidene which stands for a double-bonded two-carbon residue with two rather than one substituents, for instance in
1,1-dichloroethene ("vinylidene chloride").The vinyl group forms part of the
allyl group and is also contained in allacrylate s. Manyalkene s contain a vinyl group.The vinyl group can be made to polymerize, forming
vinyl polymer s. In these polymers, the double bonds of the vinylmonomer s turn into single bonds and the different monomers are joined by single bonds. This is an instance ofaddition polymerization . There are no vinyl groups in the resulting polymer. It is also important to ascertain the absence of unreacted vinyl monomer in the final product when the monomer is toxic or reduces the performance of the plastic.Polymers
:"Main article:
Vinyl polymer "*
Polyvinyl chloride (PVC) is made bypolymerization of themonomer vinyl chloride (chloroethene) CH2=CHCl
*Polyvinyl acetate (PVAc) is made by polymerization ofvinyl acetate . In a water suspension, this is used as a glue.
*Polyvinyl alcohol (PVA) is produced byhydrolysis ofpolyvinyl acetate . (Not by polymerization of the monomer vinyl alcohol orethenol , which is an unfavored keto-enoltautomer ofacetaldehyde .)Etymology
The
etymology of "vinyl" is theLatin "vinum" = "wine ", because of its relationship withalcohol (in its original sense of ethyl alcohol).
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